what's the Github program here?

Github gives Copilot Pro to open source maintainers but they don't really tell you what the requirements are. I have it and I just get a notification every month that it's been renewed and I never even applied for it. I assume it's a combination of activity on github and popularity of your repositories.

I mean, there's also the whole GitHub free tier. It used to only be for public repos, so mostly OSS plus "shared source", but now they allow it for private as well. But it still costs them money to host your code and provide CI minutes.